"Hun er den kuleste læreren på skolen."

Translation: She is the coolest teacher at school.

[Iorua]

She might be very yellow, but the pronunciation here is wrong. It sounds like she says «guleste», not «kuleste».

[Rowaaaan]

For kult for skolen

[TARDISToni]

Jeg kom hit for å si det!

[StageTech]

"She was the coolest teacher IN the school", was marked wrong. Here in mid-west America that would be acceptable and more likely to be used rather than "AT" the school. Please consider this a correct answer. The Duolingo dictionary sentences for the word "på" all translate as "in"